ahmadarif · June 1, 2021 15:56 · Jun 1, 2021 · Jun 1, 2021
diff --git a/readme.md b/readme.md
@@ -1,6 +1,6 @@
 Register middleware on root file
 
-```
+```ts
 require("elastic-apm-node").start(); // must be in the first line
 
 // other import libraries

diff --git a/apm.middleware.ts b/apm.middleware.ts
@@ -0,0 +1,23 @@
+import { ActionResult, CustomMiddleware, HttpStatusError, Invocation } from "@plumier/core";
+import APM from 'elastic-apm-node';
+
+export class APMMiddleware implements CustomMiddleware {
+  async execute(next: Readonly<Invocation>): Promise<ActionResult> {
+    if (next.ctx?.route?.url) {
+      APM.setTransactionName(next.ctx.route.url);
+    } else {
+      APM.setTransactionName(next.ctx.url);
+    }
+
+    try {
+      return await next.proceed();
+    } catch (e) {
+      if (e instanceof HttpStatusError) {
+        APM.captureError(e);
+      } else {
+        APM.captureError(e);
+      }
+      throw e;
+    }
+  }
+}
diff --git a/readme.md b/readme.md
@@ -0,0 +1,12 @@
+Register middleware on root file
+
+```
+require("elastic-apm-node").start(); // must be in the first line
+
+// other import libraries
+
+...
+new Plumier()
+  .use(new APMMiddleware())
+...
+```
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